Seite - 1305 - in Book of Full Papers - Symposium Hydro Engineering

3D prism targets (Fig. 1) are installed on the face of the downstream side of the dam in a grid form or at critical locations (Fig. 2) One or more high precision servo driven, computer controlled ATS is installed at a suitable location on concrete/steel pillar with protective enclosure to automatically sight these points sequentially and record data. Reference prism targets at stable locations make the system complete. Refer to figure 3 for possible mounting arrangements of the ATS. The ATS is controlled by a control box (Fig. 4) which is essentially rugged field computer. It is powered by 220 V, 50 Hz AC mains and in turn power up the ATS. Solar panels can be used where mains power supply is not available. The control box features GSM/GPRS modem with dual SIM slots for data transmission using the cellular network. Data is collected by the public cloud- based web data monitoring service described in section 3. Alarms can also be programmed in the database resulting in sending SMS/e-mail alerts automatically to the concerned personnel, in case deformation of any point breaches a predetermined trigger value. Fig. 3 ATS with different mounting arrangements 1305